ITPEC FE Subject A April 2024 Question 26
Which of the following is the network utility that is used to check detailed TCP connection information of the host?
Explanation
netstat — the utility that lists a host's TCP connections with their addresses, ports and states.
netstat shows each TCP connection's local and remote address and port and its state (LISTEN, ESTABLISHED, TIME_WAIT and so on), along with UDP endpoints and protocol statistics. That is the detailed TCP connection information the question asks for.
Answer (c)
Why not others:
- •(a) arp — displays or edits the ARP cache, the table mapping IP addresses to MAC addresses
- •(b) ipconfig — shows the configuration of the host's own network interfaces: IP address, subnet mask, default gateway
- •(d) ping — sends ICMP echo requests to check whether another host is reachable and how long replies take; it opens no TCP connection
Key rule: Pick the utility by what it reports: connections and ports (netstat), IP-to-MAC table (arp), own interface settings (ipconfig), reachability (ping), route hops (traceroute/tracert).
Networks · AI-written, may contain errors
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